#define _CRT_SECURE_NO_WARNINGS 1
int main()
{
	int m = 0;
	int n = 0;
	scanf("%d %d", &m, &n);

	int count = 0;
	int i = 0;
	for (i = 0; i < 32; i++) {
		if (((m >> i) & 1) != ((n >> i) & 1)) {
			count++;
		}
	}
	printf("%d\n", count);

	return 0;
}